Transaction Demo

Source: transaction_demo.ino
Prerequisites: funded wallet on devnet or localnet.
Shows: blockhash fetch, instruction composition, signing, serialization, submit, confirmation.

Code


Transaction tx;
Message& msg = tx.getMessage();
 
msg.addAccount(feePayerPubkey, true, true);
msg.addAccount(someWritableAcct, false, true);
msg.addAccount(someReadonlyAcct, false, false);
 
const uint8_t* ixAccounts[] = { feePayerPubkey, someWritableAcct, someReadonlyAcct };
tx.addInstruction(programId, ixAccounts, 3, ixData, sizeof(ixData));
 
uint8_t blockhash[BLOCKHASH_SIZE];
rpcClient.getLatestBlockhashBytes(blockhash);
tx.setRecentBlockhash(blockhash);
tx.sign(feePayerPrivateKey64, feePayerPubkey32);